Pedosphere最新文献

{"title":"Global and regional soil organic carbon estimates: Magnitudes and uncertainties","authors":"","doi":"10.1016/j.pedsph.2023.06.005","DOIUrl":"10.1016/j.pedsph.2023.06.005","url":null,"abstract":"<div><p>Globally, soil is the largest terrestrial carbon (C) reservoir. Robust quantification of soil organic C (SOC) stocks in existing global observation-based estimates avails accurate predictions in carbon-climate feedbacks and future climate trends. We investigated the magnitudes and distributions of global and regional SOC estimates (<em>i.e</em>., density and stocks) based on five widely used global gridded SOC datasets, a regional permafrost dataset developed in 2021 (UM2021), and a global-scale soil profile database (World Soil Information Service) reporting measurements of a series of physical and chemical edaphic attributes. The five global gridded SOC datasets were the Harmonized World Soil Database (HWSD), World Inventory of Soil Emission Potentials at 30 arc-second resolution (WISE30sec), Global Soil Dataset for Earth System Models (GSDE), Global Gridded Soil Information at 250-m resolution (SoilGrids250m), and Global Soil Organic Carbon Map (GSOCmap). Our analyses showed that the magnitude and distribution of SOC varied widely among datasets, with certain datasets showing region-specific robustness. At the global scale, SOC stocks at the top 30 and 100 cm were estimated to be 828 (range: 577–1 171) and 1 873 (range: 1 086–2 678) Pg C, respectively. The estimates from GSDE, GSOCmap, and WISE30sec were comparable, and those of SoilGrids250m and HWSD were at the upper and lower ends. The spatial SOC distribution varied greatly among datasets, especially in the northern circumpolar and Tibetan Plateau permafrost regions. Regionally, UM2021 and WISE30sec performed well in the northern circumpolar permafrost regions, and GSDE performed well in China. The estimates of SOC by different datasets also showed large variabilities across different soil layers and biomes. The discrepancies were generally smaller for the 0–30 cm soil than the 0–100 cm soil. The datasets demonstrated relatively higher agreement in grasslands, croplands, and shrublands/savannas than in other biomes (<em>e.g</em>., wetlands). The users should be mindful of the gaps between regions and biomes while choosing the most appropriate SOC dataset for specific uses. Large uncertainties in existing global gridded SOC estimates were generally derived from soil sampling density, different sources, and various mapping methods for soil datasets. We call for future efforts for standardizing soil sampling efforts, cross-dataset comparison, proper validation, and overall global collaboration to improve SOC estimates.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 685-698"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42028794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combining conservation tillage with nitrogen fertilization promotes maize straw decomposition by regulating soil microbial community and enzyme activities","authors":"","doi":"10.1016/j.pedsph.2023.05.005","DOIUrl":"10.1016/j.pedsph.2023.05.005","url":null,"abstract":"<div><p>Straw return can effectively improve farmland soil microenvironment and fertility. However, excessive straw in the topsoil adversely affects seed germination and crop growth. At present, the characteristics and key driving factors of straw decomposition in dry farmlands are unclear. Based on the interactions between tillage practices including zero tillage (ZT), chisel tillage (CT), and plow tillage (PT) and nitrogen (N) fertilization, <em>i.e</em>., low N (N1, 180 kg ha^-1), normal N (N2, 240 kg ha^-1), and high N (N3, 300 kg ha^-1), quantitative polymerase chain reaction technology and an enzymatic detection kit were used to investigate the effects of key straw C-degrading enzyme activities and microbial abundance in soil on maize straw decomposition during the growth period of winter wheat in the winter wheat/summer maize double cropping system in a dry farmland of the Loess Plateau, China. Between 2018 and 2020, ZT and CT significantly increased winter wheat yield (by 10.94% and 12.79%, respectively) and straw decomposition velocity (by 20% and 26.67%, respectively), compared with PT. Compared to N1 and N3, N2 significantly increased wheat yield (by 4.65% and 5.31%, respectively) and straw decomposition velocity (by 26.33% and 13.21%, respectively). The partial least squares pathway modelling showed significant positive direct effects of soil moisture, NO₃^-, NH₄⁺, total N, bacteria, and cellulase, laccase, and xylanase activities on straw decomposition, while soil pH, fungi, and Actinomycetes had significant negative direct effects. Overall, conservation tillage (ZT and CT) combined with N2 was beneficial for straw decomposition in the drylands of the Loess Plateau and improved straw resource utilization and basic soil fertility. The results of the study clarified the key drivers of straw decomposition in dry farmlands and provided new ideas for developing updated soil management practices and adaptive N application strategies to promote the resource utilization of straw and achieve the goals of carbon peaking and carbon neutrality.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 783-796"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41948405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ warming does not change soil priming effect induced by glucose addition in a temperate forest","authors":"","doi":"10.1016/j.pedsph.2023.06.003","DOIUrl":"10.1016/j.pedsph.2023.06.003","url":null,"abstract":"<div><p>Priming effect (PE) on soil organic carbon (SOC) decomposition caused by the addition of organic carbon (C) is an important ecological process in regulating soil C cycle. Additionally, most priming studies are confined to laboratory trials, while the assessment of soil PE under field conditions with variable weather conditions is scarce. This study assessed the direct effects of glucose addition and <em>in-situ</em> warming on the extent of PE under field conditions in a temperate forest. We evaluated soil PE using ¹³C-glucose labelling, a simple and novel technique, based on the Keeling plot method. Glucose addition significantly enhanced native SOC decomposition and induced strong PE. However, the effect of <em>in-situ</em> warming on the extent of PE was not significant. This study confirms the importance of PE in regulating SOC turnover under field conditions.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 759-769"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45035319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rhizosphere microbes influence wogonoside accumulation in perennial Scutellaria baicalensis","authors":"Yang SUN ,&nbsp;Hong LIU ,&nbsp;Junwei PENG ,&nbsp;Minchong SHEN ,&nbsp;Yang HU ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yuanhua DONG","doi":"10.1016/j.pedsph.2023.04.008","DOIUrl":"10.1016/j.pedsph.2023.04.008","url":null,"abstract":"<div><p>Dried roots of <em>Scutellaria baicalensis</em> Georgi are an acclaimed traditional Chinese medicine, and wogonoside content is a key indicator used to evaluate <em>S. baicalensis</em> quality. Rather than rising linearly with cultivation years, <em>S. baicalensis</em> quality initially increases and then declines. However, little is known regarding the dynamic variations in <em>S. baicalensis</em> rhizosphere microorganisms under long-term cultivation and underlying mechanisms of their effects on wogonoside formation and accumulation. The aim of this study was to investigate the roles of soil nutrients and rhizosphere microbes on <em>S. baicalensis</em> quality across different cultivation years (1–4 years). The wogonoside content (25.14 mg g^-1) was highest in the biennial <em>S. baicalensis</em> and then decreased following long-term cultivation. Most soil nutrients (available nitrogen, available phosphorus, available iron, available manganese, and available zinc) were reduced significantly as cultivation years increased. Time also affected rhizosphere bacterial community structure significantly, driving it toward deterministic process (<em>i.e</em>., β-nearest taxon index &lt; -2). Available manganese and exchangeable calcium indirectly affected wogonoside formation and accumulation. Wogonoside inhibition was driven by the reduction in rhizosphere bacterial diversity, which significantly increased the relative abundance of beta-glucosidase and decreased the relative abundance of phenylalanine ammonialyase. The rhizosphere microenvironment was altered under long-term cultivation, thereby shaping rhizosphere bacterial community, reducing the community diversity, and ultimately inhibiting wogonoside formation and accumulation. Our findings may aid in understanding of the mechanisms and reasons for the reduction in <em>S. baicalensis</em> quality under long-term cultivation from the perspective of soil nutrients and microorganisms, which may theoretically support the future artificial cultivation and management of Chinese medicinal plants.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 553-566"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48002267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A perspective on greenhouse gas emission studies integrating arbuscular mycorrhiza","authors":"Stavros D. VERESOGLOU,&nbsp;Junjiang CHEN","doi":"10.1016/j.pedsph.2023.01.001","DOIUrl":"10.1016/j.pedsph.2023.01.001","url":null,"abstract":"<div><p>Climate change is a global emergency. It is only possible to pace down global change through addressing the triggers of it, greenhouse gas emissions. Despite commendable progress, we think that there is plenty of room to further make the studies addressing global change realistic, through integrating into them biotic interactions. We make a case for this statement through a bibliometrics analysis on agricultural studies exploring greenhouse gas emissions that consider arbuscular mycorrhiza. We show that even though mycorrhizal studies account right now for a small fraction of the agricultural literature, they get cited more often. We further demonstrate that mycorrhizal studies are typically more descriptive in their nature, which we support through comparing the keywords they list. We subsequently use the opportunity to identify shortcomings and opportunities to further integrate mycorrhiza into agricultural studies assaying greenhouse gas emissions. We finally make a call to better integrate arbuscular mycorrhiza into global change studies.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 525-529"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytoremediation capacity of the hyperaccumulator Solanum nigrum L. and Solanum lycopersicum L. cultivars at the flowering stage in cadmium-polluted soil","authors":"Jibao JIA ,&nbsp;Huiping DAI ,&nbsp;Shuhe WEI ,&nbsp;Lidia SKUZA ,&nbsp;Jianming XUE ,&nbsp;Rong LI ,&nbsp;Quan SUN","doi":"10.1016/j.pedsph.2023.03.001","DOIUrl":"10.1016/j.pedsph.2023.03.001","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 676-680"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43021498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Incorporation of source contributions to improve the accuracy of soil heavy metal mapping using small sample sizes at a county scale” (Pedosphere. 34(1): 170–180, 2024)","authors":"Jie SONG ,&nbsp;Xin WANG ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yanhe ZHAO ,&nbsp;Siwei WANG ,&nbsp;Lixia MA","doi":"10.1016/S1002-0160(24)00055-9","DOIUrl":"https://doi.org/10.1016/S1002-0160(24)00055-9","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Page 651"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1002016024000559/pdfft?md5=f4578c299baba269348411e00c960687&pid=1-s2.0-S1002016024000559-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141325287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heavy metals potentially drive co-selection of antibiotic resistance genes by shifting soil bacterial communities in paddy soils along the middle and lower Yangtze River","authors":"Ya ZHANG ,&nbsp;Hao WANG ,&nbsp;Minghui HU ,&nbsp;Rui CAI ,&nbsp;Yuqing MIAO ,&nbsp;Xiancan ZHU","doi":"10.1016/j.pedsph.2023.01.012","DOIUrl":"10.1016/j.pedsph.2023.01.012","url":null,"abstract":"<div><p>Heavy metals (HMs) and antibiotic resistance have become serious environmental problems affecting soil and human health. Soil microorganisms play key roles in pollutant degradation and biogeochemical cycling processes; however, the interactions among HMs, soil microbial communities, and antibiotic resistance genes (ARGs) in agricultural soils remain unclear. Using quantitative real-time polymerase chain reaction and NovaSeq sequencing, we evaluated heavy metal contents, abundances of ARGs, soil bacterial community structure and functions, and their correlations in paddy soils at 43 sampling sites along the middle and lower reaches of the Yangtze River, central and eastern China. Our results showed the co-occurrence of HMs, ARGs, and HM resistance genes across all paddy soils. Additionally, significant positive associations were detected between HMs and resistance genes. Cadmium, <em>czcA</em>, and <em>int1</em> were positively correlated with bacterial community diversity. The Mantel test showed that bacterial community composition and functions were significantly associated with HMs and resistance genes, such as Cd, Cr, Zn, <em>copA</em>, <em>czcA</em>, <em>int1</em>, and <em>sul1</em>. Moreover, HMs and ARGs were the major factors shaping soil bacterial communities; thus, HMs triggered proliferation of HM and antibiotic resistances by influencing the mobile genetic element (<em>int1</em>) and soil microbial communities. Our study revealed that HMs potentially drive the co-selection of ARGs by shifting soil bacterial community structure and functions, thereby increasing the potential risks to human health as well as ecological environment in the paddy soils along the middle and lower reaches of the Yangtze River.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 606-619"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42099866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increasing phosphorus fertilizer value of recycled iron phosphates by prolonged flooding and organic matter addition","authors":"Rochelle Joie SARACANLAO ,&nbsp;Hannah VAN RYCKEL ,&nbsp;Mieke VERBEECK ,&nbsp;Maarten EVERAERT ,&nbsp;Erik SMOLDERS","doi":"10.1016/j.pedsph.2023.03.020","DOIUrl":"10.1016/j.pedsph.2023.03.020","url":null,"abstract":"<div><p>Iron (Fe) minerals are commonly used to remove phosphorus (P) from waste streams, producing P-loaded Fe(III) oxides or Fe(II) phosphate minerals (<em>e.g</em>., vivianite). These minerals may be used as fertilizers to enhance P circularity if solubilized in soil. Here, we tested the P fertilizer value of recycled Fe phosphates (FePs) in a pot trial and in an incubation experiment, hypothesizing that P release from FePs is possible under Fe(III)-reducing conditions. First, a pot trial was set up with rice (<em>Oryza sativa</em>) in all combinations of soil flooding or not, three P-deficient soils (acid, neutral, and calcareous), and six FePs (three Fe(III)Ps and three Fe(II)Ps) referenced to triple superphosphate (TSP) or zero amendments. Shoot P uptake responded to TSP application in all treatments but only marginally to FePs. The redox potential did not decrease to -200 mV by flooding for a brief period (13 d) during the pot trial. A longer incubation experiment (60 d) was performed, including a treatment of glutamate addition to stimulate reductive conditions, and P availability was assessed with CaCl₂ extraction of soils. Glutamate addition and/or longer incubation lowered soil redox potential to &lt; -100 mV. On the longer term, Fe(III) minerals released P, and adequate P was reached in the calcareous soil and in the neutral soil amended with Fe(III)P-sludge. It can be concluded that prolonged soil flooding and organic matter addition can enhance the P fertilizer efficiency of FePs. Additionally, application of FeP in powder form may enhance P availability.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 631-640"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42982781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pore shrinkage capacity of Shajiang black soils (Vertisols) on the North China Plain and its influencing factors","authors":"Yueming CHEN ,&nbsp;Zhongbin ZHANG ,&nbsp;Lei GAO ,&nbsp;Zichun GUO ,&nbsp;Peng XIONG ,&nbsp;Fahui JIANG ,&nbsp;Xinhua PENG","doi":"10.1016/j.pedsph.2023.04.006","DOIUrl":"10.1016/j.pedsph.2023.04.006","url":null,"abstract":"<div><p>Different pore sizes present different pore shrinkage capacities in a nonrigid soil. However, the shrinkage capacities of different pore sizes and their influencing factors are not clear. We aimed to quantify the shrinkage capacities of different pore sizes (large pores, &gt; 50 μm; medium pores, 0.2–50 μm; fine pores, &lt; 0.2 μm) and determine how soil properties impact soil shrinkage capacity at the regional scale. Two sampling transects from west to east (360 km long, 35 samples) and from north to south (190 km long, 29 samples) were selected to investigate soil shrinkage capacity and physicochemical properties of at 0–20 cm depth in the Vertisol (locally known as Shajiang black soil) region of the North China Plain. The results showed that soil total shrinkage capacity, indicated by the coefficient of linear extensibility (COLE), had a mean value of 0.041–0.051 in the west-east and north-south transects. Large pores had higher pore shrinkage index (PSI) values (0.103–0.109) than medium (0.077–0.096) and fine (0.087–0.091) pores. The PSI of fine pores showed a fluctuating increasing trend from northwest to southeast, and the fine pore shrinkage capacity determined the COLE (<em>r</em>² = 0.789, <em>P</em> &lt; 0.001). The PSI of large pores had a significant relationship with soil bulk density (<em>r</em> = 0.281, <em>P</em> &lt; 0.05) and organic carbon (<em>r</em> = -0.311, <em>P</em> &lt; 0.05), whereas those of medium and fine pores were correlated with soil clay content (<em>r</em> = 0.381 and 0.687, respectively, <em>P</em> &lt; 0.001). In addition, the PSI of fine pores was also correlated with montmorillonite content (<em>r</em> = 0.387, <em>P</em> &lt; 0.01). It can be concluded that the PSI of large pores is related to anthropogenically influenced soil properties with low stability, whereas those of medium and fine pores are related to pedogenic properties. The high variability in anthropogenic and pedogenic factors explains the spatial pattern of Vertisol shrinkage capacity on the North China Plain.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 620-630"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47514206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}